javascript underscore

The first and second sections of this series introduce JavaScript module prototypes and theoretical concepts, and today we show you how to use them in combat. I am using a very popular library require.js interested friends can understand the next AHI am using a very popular library require.js.First, why use Require.js?At the earliest, all JavaScript code was written in a single file, as long as the file was

Learning javascript object-oriented understanding javascript objects and javascript object-oriented I. Programming ideasProcess-oriented: process-oriented, step-by-step Refinement from top to bottom. The program is regarded as a set of function calls.Object-oriented: Objects Act as the basic unit of a program and are decomposed into data and related operations.Ii

Understanding and using JavaScript callback functions | JavaScript is very sexy and javascript callback Functions In JavaScript, a function is the first class Object. This means that the function is of the Object type and can be used in the first class like other objects (such as String, Array, and Number, because they

example: in the old version of jquery, is not inherited AMD specifications, so can not directly require["jquery", this time need shim, For example, if I use the underscore class library, but he does not implement the AMD specification, then we can configure:require.config ({ shim: {"underscore" : { " _ " ; } }})With this configuration, we can refer to the

posture is the key to optimizing JavaScript from a language level.3. Optimize your JavaScriptFinally get to the point, thank you for your patience to see here, after so many introductions above, I believe you have a good understanding of the memory management mechanism of JavaScript, then the following tips will make you more powerful.3.1 Use of functionsIf you have the habit of reading a good

Use of functions If you have the habit of reading excellent JavaScript programs, you will find that many of Daniel's development of the front-end JavaScript code often uses an anonymous function to wrap around the outermost layer of the code. Copy Code code as follows: (function () { Main business code })(); Some are even more advanced: Copy Code code as follows: ;(fu

After reading the BestPractices chapter of JavaScriptDOM programming art, we know that we have many things to consider when creating a webpage. For example, we use JavaScript to enhance our webpage, but we need to consider that, if your browser does not support JavaScript, or the user disable JavaScript, can our webpage be displayed normally? For example, The

Javascript: a deep understanding of basic Javascript knowledge and a deep understanding of javascriptThe eval global function is shown in the loader of dojo as the next function. Var eval _ = new Function ('Return eval (arguments [0]); '); // The Function runs in the top-level scope, but the running efficiency is slower, however, this method does not pollute global variables and calls the top-level scope ev

Why is the current mainstreamProgramAre all objects created in the language? The following definition gives us an answer: In object-oriented languages, objects are defined as anything that people want to study. From the simplest integer to the complex aircraft, objects can be viewed as objects, it not only represents specific things, but also abstract rules, plans, or events.Aside from these abstract definitions, we can understand them from the underlying computer technology,Objects are actual

[JavaScript] implements multiple JavaScript special effects and javascript special effects on the same webpage. If the label appears twice on the webpage, all the JavaScipt scripts will no longer take effect, the label can only appear once. However, multiple JavaScript effects are often required for the same webpage.

This article mainly introduces common JavaScript Array Operation Skills, and summarizes various common operation skills for Array search, connection, sorting, and iteration in the form of examples, which is of great practical value, for more information about how to use JavaScript arrays, see the examples in this article. Share it with you for your reference. The details are as follows: Preface I believe e

output result without any side effects. However, they are the Implementation Standard of ECMAScript 5.1 in the browser, and they only work in arrays. Each time you call them, a new array is created and returned, and the existing array is not changed. They use functions as input and often use anonymous functions as Callback functions. They traverse the array and apply this function to every element of the array! myArray = [1,2,3,4];newArray = myArray.map(function(x) {return x*2});console.log(my

variables, in this way, nested asynchronous callback is implemented perfectly. 2. Implement Private Members We know that JavaScript objects do not have private attributes, that is to say, every attribute of an object is exposed to the outside. This may cause security risks. For example, if the user of an object directly modifies an attribute, the internal data consistency of the object is damaged. JavaScript